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JavaScript JavaScript Basics Working with Strings Combine and Manipulate Strings

Michael Rushton
Michael Rushton
3,119 Points

Convert to toUpperCase giving me an error cannot read property null? I can't work out what i have left out.

I think my code looks the same as the hints example but keep getting an error cannot read null or something like that.

let firstName = 'Mike';
let lastName = 'Rush';
let role = 'developer';
let msg = (firstName + " " + lastName + ": "  + role);
let role = role.toUpperCase();

2 Answers

Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 90,669 Points

I think it's because you're declaring let role a second time.

Simply call .toUpperCase() on the role variable where you've stored it in your msg string.

Darion Capers
Darion Capers
2,151 Points

Im having trouble here as well i keep getting errors